Valve and Injector Replacement Parts

Chrom Tech supplies genuine Agilent valves and manual injectors engineered for precise, reliable sample introduction in LC workflows. As an authorized Agilent distributor, we provide only manufacturer-certified components that deliver long-term stability, exceptional sealing performance, and compatibility with InfinityLab LC systems.

Rotor–stator assemblies are among the most heavily stressed parts of any autosampler. Their usable lifetime depends on the quality of the construction materials, surface finish, and manufacturing tolerances. Agilent rotors and stators are designed, polished, and endurance-tested to maximize service life, reduce carryover, and minimize system downtime—ensuring consistent, trouble-free injections across demanding analytical sequences.

Genuine Agilent components from an authorized distributor.
Agilent HPLC Parts Finder Tool
Launch Tool
Identify verified Agilent-compatible LC pump, autosampler, and detector parts by selecting your instrument model.
Key Definitions â–¶
Valve Rotor
The moving component inside a switching valve that directs mobile-phase flow. Genuine Agilent rotors are precision-polished to reduce wear and provide consistent sealing under high pressure.
Valve Stator
The stationary component that interfaces with the rotor to control flow paths. High-quality stators maintain alignment and help minimize carryover in autosampler and LC valve assemblies.
Manual Injector
A hand-operated sample introduction device used in LC systems. Manual injectors offer robust control, low maintenance, and reliable operation for routine chromatography workflows.
Injection Port
The interface where the sample loop connects to the flow path. Proper alignment and sealing help maintain reproducibility and minimize sample loss.
Sample Loop
A calibrated stainless-steel loop that holds a precise volume of sample before injection into the LC system. Accurate loop sizing ensures consistent injection volumes.
Frequently Asked Questions â–¶
How often should valve rotors and stators be replaced?
Replacement frequency varies by workload, solvents, and operating pressure. Many labs replace rotors and stators every 6–12 months to maintain consistent flow paths and help prevent leaks, carryover, or injection issues.
What are the signs of a worn valve or injector?
Common indicators include increased or unstable system pressure, inconsistent injection volumes, leaks, carryover, or degraded peak shape. Using genuine replacement parts helps minimize these issues and restore reproducibility.
Are Chrom Tech valves and injectors genuine Agilent components?
Yes. Chrom Tech is an authorized Agilent distributor and supplies only authentic, manufacturer-tested components designed for full compatibility and reliable LC performance.
How do I choose the correct rotor or stator for my LC model?
Use the Chrom Tech filters for your instrument series and review the compatibility details on each product page. If you’re matching to a specific valve head or injector, verify the model and configuration to ensure correct fit and performance.
Should manual injectors be serviced or replaced?
Manual injectors are durable, but they should be serviced or rebuilt when seal wear, leaks, or inconsistent injections appear. Genuine injector components help restore reliable operation for routine workflows.